Cassandra is usually portrayed as somewhat set apart from the other cats - her costume marks her out as a different breed from the others, being devoid of visible fur. She is beautiful and elegant, with the tall, lithe body of a dancer, and is often aloof with the other cats.
Cassandra dislikes the childish antics of the kittens, alerting Skimble when one of them messes up the formation by switching places with her during "Skimbleshanks: The Railway Cat.”